These rice krispie treats are deliciously addictive as the peanut butter adds a slightly salty, nutty flavour which balances out the sweetness. Directions Start by toasting the Rice Krispies. Pop the butter, peanut butter and marshmallows into a large saucepan with a pinch of salt. Stir through the toasted rice krispies then transfer to a 20 x 20cm loose-bottomed square tin. Once melted, pour over the Rice Krispie mixture and spread until it is evenly covered.